An all-digital implementation of blinking analog-to-digital converter

Abstract

The invention belongs to the technical field of integrated circuits, and concretely provides a fully digitalized scintillation type analog-to-digital converter. The converter comprises differential signal sampling maintenance arrays formed by two three-state gates connected in parallel and decoupling capacitors, (2<N>-1) differential delay line pairs formed by NAND gate / NOT gates and decoupling capacitors and having built-in reference voltages, and a latch array. Differential signals pass across the two identical sampling maintenance arrays, each DDLP corresponds to a pair of differential reference voltages, the differential signals control the DDLPs to generate different delays during a maintenance period, the delay of delay lines is determined by the plurality of NAND gate / NOT gates, and fine tuning is achieved through the decoupling capacitors. Then, a comparison step is performed by the latch array, the delays of two output rising edges of the DDLPs are obtained, and digital comparison outputs of thermometer codes are obtained. The fully digitalized scintillation type analog-to-digital converter has a good analog-to-digital conversion property at high speed, areas and power consumption can be reduced, and also the design complexity is minimized.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to an all-digital realization of a blinking analog-to-digital converter. Background technique [0002] With the continuous progress of the technology, due to the influence of the short channel effect, the analog circuit cannot be effectively scaled down, and the power consumption is relatively large. At the same time, it strongly relies on the experience of the designer and lacks suitable and efficient automatic design tools. The analog-to-digital converters, whether it is a sequential comparison structure, a blinking structure, or a pipeline structure, have a considerable part of the analog section, which reduces the design efficiency of the analog-to-digital converter. The digital circuit can make up for the shortcomings of the above-mentioned analog circuit and make full use of the advantages brought by the advanced technology. [0003] The structure of t...

AI Technical Summary

Problems solved by technology

More resistors are used here, which increases the area. At the same time, a large number of analog comparators are used, which increases the area and consumes a lot of power consumption.

[0004] In order to solve the waste of power consumption and area of ​​the analog-to-digital converter implemented by traditional analog, and improve the design automation and efficiency of the analog-to-digital converter, the present invention proposes a flashing analog-to-digital converter implemented by all-digital construction. Replace all the modules in the traditional flashing analog-to-digital converter with units in the digital standard cell library, and complete the full digital implementation of the analog-to-digital converter

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